Type: INTEGER (long)
*/ public static final String ID = "_id"; /** - * The parent's id for note or folder + * *笔记或文件夹的父id *Type: INTEGER (long)
*/ public static final String PARENT_ID = "parent_id"; /** - * Created data for note or folder + *为笔记或文件夹创建数据 *Type: INTEGER (long)
*/ public static final String CREATED_DATE = "created_date"; /** - * Latest modified date + *最新修改日期 *Type: INTEGER (long)
*/ public static final String MODIFIED_DATE = "modified_date"; /** - * Alert date + *警报日期 *Type: INTEGER (long)
*/ public static final String ALERTED_DATE = "alert_date"; /** - * Folder's name or text content of note + *文件夹的名称或文本内容的说明 *Type: TEXT
*/ public static final String SNIPPET = "snippet"; /** - * Note's widget id + * Note的小部件id *Type: INTEGER (long)
*/ public static final String WIDGET_ID = "widget_id"; /** - * Note's widget type + * Note的小部件类型 *Type: INTEGER (long)
*/ public static final String WIDGET_TYPE = "widget_type"; /** - * Note's background color's id + *笔记的背景颜色的id *Type: INTEGER (long)
*/ public static final String BG_COLOR_ID = "bg_color_id"; /** - * For text note, it doesn't has attachment, for multi-media - * note, it has at least one attachment + *对于文本笔记，它没有附件，对于多媒体 + *注意，它至少有一个附件 *Type: INTEGER
*/ public static final String HAS_ATTACHMENT = "has_attachment"; /** - * Folder's count of notes + *文件夹的注释计数 *Type: INTEGER (long)
*/ public static final String NOTES_COUNT = "notes_count"; /** - * The file type: folder or note + *文件类型:文件夹或便签 *Type: INTEGER
*/ public static final String TYPE = "type"; /** - * The last sync id + *最后一个同步id *Type: INTEGER (long)
*/ public static final String SYNC_ID = "sync_id"; /** - * Sign to indicate local modified or not + *符号表示本地是否被修改 *Type: INTEGER
*/ public static final String LOCAL_MODIFIED = "local_modified"; /** - * Original parent id before moving into temporary folder + *移动到临时文件夹前的原始父id *Type : INTEGER
*/ public static final String ORIGIN_PARENT_ID = "origin_parent_id"; /** - * The gtask id + * gtask id *Type : TEXT
*/ public static final String GTASK_ID = "gtask_id"; /** * The version code - *Type : INTEGER (long)
+ * *Type : INTEGER (long)
*/ public static final String VERSION = "version"; } public interface DataColumns { /** - * The unique ID for a row + *一行的唯一ID *Type: INTEGER (long)
*/ public static final String ID = "_id"; /** - * The MIME type of the item represented by this row. + *由这一行表示的项目的MIME类型。 *Type: Text
*/ public static final String MIME_TYPE = "mime_type"; /** - * The reference id to note that this data belongs to + *该数据所属的引用id *Type: INTEGER (long)
*/ public static final String NOTE_ID = "note_id"; /** - * Created data for note or folder + *为笔记或文件夹创建数据 *Type: INTEGER (long)
*/ public static final String CREATED_DATE = "created_date"; /** - * Latest modified date + *最新修改日期 *Type: INTEGER (long)
*/ public static final String MODIFIED_DATE = "modified_date"; /** - * Data's content + *数据内容 *Type: TEXT
*/ public static final String CONTENT = "content"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * integer data type + *泛型数据列，含义是{@link #MIMETYPE}特定的，用于 + 整数数据类型 *Type: INTEGER
*/ public static final String DATA1 = "data1"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * integer data type + *泛型数据列，含义是{@link #MIMETYPE}特定的，用于 + 整数数据类型 *Type: INTEGER
*/ public static final String DATA2 = "data2"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * TEXT data type + *泛型数据列，含义是{@link #MIMETYPE}特定的，用于 + * TEXT数据类型 *Type: TEXT
*/ public static final String DATA3 = "data3"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * TEXT data type + *泛型数据列，含义是{@link #MIMETYPE}特定的，用于 + * TEXT数据类型 *Type: TEXT
*/ public static final String DATA4 = "data4"; /** - * Generic data column, the meaning is {@link #MIMETYPE} specific, used for - * TEXT data type + *泛型数据列，含义是{@link #MIMETYPE}特定的，用于 + * TEXT数据类型 *Type: TEXT
*/ public static final String DATA5 = "data5"; @@ -243,7 +243,7 @@ public class Notes { public static final class TextNote implements DataColumns { /** - * Mode to indicate the text in check list mode or not + *模式，表示文本是否处于检查列表模式 *Type: Integer 1:check list mode 0: normal mode
*/ public static final String MODE = DATA1; @@ -259,13 +259,13 @@ public class Notes { public static final class CallNote implements DataColumns { /** - * Call date for this record + *此记录的呼叫日期 *Type: INTEGER (long)
*/ public static final String CALL_DATE = DATA1; /** - * Phone number for this record + *此记录的电话号码 *Type: TEXT
*/ public static final String PHONE_NUMBER = DATA3; diff --git a/src/Notes-master3/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java b/src/Notes-master3/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java index ffe5d57..2ebd68e 100644 --- a/src/Notes-master3/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java +++ b/src/Notes-master3/app/src/main/java/net/micode/notes/data/NotesDatabaseHelper.java @@ -14,7 +14,8 @@ * limitations under the License. */ -package net.micode.notes.data; +package net.micode.notes.data;/**1.数据库操作，SQLOpenhelper,对一些note和文件进行数据库的操作。比如删除文件后，将文件里的note也相应删除**/ + import android.content.ContentValues; import android.content.Context; @@ -27,13 +28,14 @@ import net.micode.notes.data.Notes.DataConstants; import net.micode.notes.data.Notes.NoteColumns; -public class NotesDatabaseHelper extends SQLiteOpenHelper { - private static final String DB_NAME = "note.db"; +public class NotesDatabaseHelper extends SQLiteOpenHelper {/**2.继承于SQLiteOpenHelper的类NotesDatabaseHelper，用于实现对便签或者 文件的数据库操作，例如删除便签**/ + + private static final String DB_NAME = "note.db";/**2.定义数据库的名称为“note.db”**/ private static final int DB_VERSION = 4; - public interface TABLE { - public static final String NOTE = "note"; + public interface TABLE {/**1.接口，分成note和data，在后面的程序里分别使用过**/ + public static final String NOTE = "note";/**2.数据库中创建的note表信息**/ public static final String DATA = "data"; } @@ -42,7 +44,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { private static NotesDatabaseHelper mInstance; - private static final String CREATE_NOTE_TABLE_SQL = + private static final String CREATE_NOTE_TABLE_SQL = /**1.SQL的触发器是一个能由系统自动执行对数据库修改的语句，由文件的增加事件触发。文件夹中移入一个Note之后需要更改的数据的表格。**/ "CREATE TABLE " + TABLE.NOTE + "(" + NoteColumns.ID + " INTEGER PRIMARY KEY," + NoteColumns.PARENT_ID + " INTEGER NOT NULL DEFAULT 0," + @@ -63,7 +65,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { NoteColumns.VERSION + " INTEGER NOT NULL DEFAULT 0" + ")"; - private static final String CREATE_DATA_TABLE_SQL = + private static final String CREATE_DATA_TABLE_SQL =/**3. 创建SQL的data表。下面是表头**/ "CREATE TABLE " + TABLE.DATA + "(" + DataColumns.ID + " INTEGER PRIMARY KEY," + DataColumns.MIME_TYPE + " TEXT NOT NULL," + @@ -78,14 +80,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { DataColumns.DATA5 + " TEXT NOT NULL DEFAULT ''" + ")"; - private static final String CREATE_DATA_NOTE_ID_INDEX_SQL = + private static final String CREATE_DATA_NOTE_ID_INDEX_SQL =/**1.文件夹移除note时触发垃圾回收**/ "CREATE INDEX IF NOT EXISTS note_id_index ON " + TABLE.DATA + "(" + DataColumns.NOTE_ID + ");"; /** * Increase folder's note count when move note to the folder */ - private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = + private static final String NOTE_INCREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER =/**4. 构建一条SQL语句，实现当note移动到文件夹中时，文件夹的数量增加的功能**/ "CREATE TRIGGER increase_folder_count_on_update "+ " AFTER UPDATE OF " + NoteColumns.PARENT_ID + " ON " + TABLE.NOTE + " BEGIN " + @@ -95,7 +97,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Decrease folder's note count when move note from folder + *减少文件夹的笔记数时，移动笔记从文件夹 */ private static final String NOTE_DECREASE_FOLDER_COUNT_ON_UPDATE_TRIGGER = "CREATE TRIGGER decrease_folder_count_on_update " + @@ -108,7 +110,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Increase folder's note count when insert new note to the folder + *增加文件夹的笔记计数时，插入新的笔记到文件夹 */ private static final String NOTE_INCREASE_FOLDER_COUNT_ON_INSERT_TRIGGER = "CREATE TRIGGER increase_folder_count_on_insert " + @@ -120,7 +122,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Decrease folder's note count when delete note from the folder + *从文件夹中删除笔记时减少文件夹的笔记数量 */ private static final String NOTE_DECREASE_FOLDER_COUNT_ON_DELETE_TRIGGER = "CREATE TRIGGER decrease_folder_count_on_delete " + @@ -133,7 +135,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Update note's content when insert data with type {@link DataConstants#NOTE} + *当插入类型为{@link DataConstants# note}的数据时，更新note的内容 */ private static final String DATA_UPDATE_NOTE_CONTENT_ON_INSERT_TRIGGER = "CREATE TRIGGER update_note_content_on_insert " + @@ -146,7 +148,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Update note's content when data with {@link DataConstants#NOTE} type has changed + *当{@link DataConstants# note}类型的数据发生变化时更新note的内容 */ private static final String DATA_UPDATE_NOTE_CONTENT_ON_UPDATE_TRIGGER = "CREATE TRIGGER update_note_content_on_update " + @@ -159,7 +161,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Update note's content when data with {@link DataConstants#NOTE} type has deleted + *当{@link DataConstants# note}类型的数据被删除时，更新note的内容 */ private static final String DATA_UPDATE_NOTE_CONTENT_ON_DELETE_TRIGGER = "CREATE TRIGGER update_note_content_on_delete " + @@ -172,7 +174,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Delete datas belong to note which has been deleted + *删除属于已删除笔记的数据 */ private static final String NOTE_DELETE_DATA_ON_DELETE_TRIGGER = "CREATE TRIGGER delete_data_on_delete " + @@ -183,7 +185,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Delete notes belong to folder which has been deleted + *删除笔记属于已删除的文件夹 */ private static final String FOLDER_DELETE_NOTES_ON_DELETE_TRIGGER = "CREATE TRIGGER folder_delete_notes_on_delete " + @@ -194,7 +196,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { " END"; /** - * Move notes belong to folder which has been moved to trash folder + *移动笔记属于文件夹已移动到垃圾文件夹 */ private static final String FOLDER_MOVE_NOTES_ON_TRASH_TRIGGER = "CREATE TRIGGER folder_move_notes_on_trash " + @@ -239,14 +241,14 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { ContentValues values = new ContentValues(); /** - * call record foler for call notes + *通话记录文件夹用于通话记录 */ values.put(NoteColumns.ID, Notes.ID_CALL_RECORD_FOLDER); values.put(NoteColumns.TYPE, Notes.TYPE_SYSTEM); db.insert(TABLE.NOTE, null, values); /** - * root folder which is default folder + *根文件夹，这是默认文件夹 */ values.clear(); values.put(NoteColumns.ID, Notes.ID_ROOT_FOLDER); @@ -254,7 +256,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.insert(TABLE.NOTE, null, values); /** - * temporary folder which is used for moving note + *用于移动笔记的临时文件夹 */ values.clear(); values.put(NoteColumns.ID, Notes.ID_TEMPARAY_FOLDER); @@ -262,7 +264,7 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.insert(TABLE.NOTE, null, values); /** - * create trash folder + *创建垃圾文件夹 */ values.clear(); values.put(NoteColumns.ID, Notes.ID_TRASH_FOLER); @@ -270,14 +272,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { db.insert(TABLE.NOTE, null, values); } - public void createDataTable(SQLiteDatabase db) { - db.execSQL(CREATE_DATA_TABLE_SQL); + public void createDataTable(SQLiteDatabase db) {/**1.创建表格（用来存储标签内容） +**/ + db.execSQL(CREATE_DATA_TABLE_SQL); reCreateDataTableTriggers(db); db.execSQL(CREATE_DATA_NOTE_ID_INDEX_SQL); Log.d(TAG, "data table has been created"); } - private void reCreateDataTableTriggers(SQLiteDatabase db) { + private void reCreateDataTableTriggers(SQLiteDatabase db) {/**2. 重构数据库的data表单的触发器，防止定义冲突**/ db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_insert"); db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_update"); db.execSQL("DROP TRIGGER IF EXISTS update_note_content_on_delete"); @@ -292,15 +295,15 @@ public class NotesDatabaseHelper extends SQLiteOpenHelper { mInstance = new NotesDatabaseHelper(context); } return mInstance; - } + }/**1.如果NotesDatabaseHelper的实例创建失败，那就重新建一个，重新分配内从空间**/ @Override public void onCreate(SQLiteDatabase db) { createNoteTable(db); createDataTable(db); - } + }/**5. 在对象生命周期开始的时候，onCreate被系统调用，所以这里重写这个函数，生成两个数据库表单，一个是便签表单，另一个是数据表单**/ - @Override + @Override/**1.数据库版本的更新，包括数据库内容的更改**/ public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { boolean reCreateTriggers = false; boolean skipV2 = false; diff --git a/src/Notes-master3/app/src/main/java/net/micode/notes/data/NotesProvider.java b/src/Notes-master3/app/src/main/java/net/micode/notes/data/NotesProvider.java index edb0a60..6897999 100644 --- a/src/Notes-master3/app/src/main/java/net/micode/notes/data/NotesProvider.java +++ b/src/Notes-master3/app/src/main/java/net/micode/notes/data/NotesProvider.java @@ -1,22 +1,5 @@ -/* - * Copyright (c) 2010-2011, The MiCode Open Source Community (www.micode.net) - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - package net.micode.notes.data; - import android.app.SearchManager; import android.content.ContentProvider; import android.content.ContentUris; @@ -33,9 +16,15 @@ import net.micode.notes.R; import net.micode.notes.data.Notes.DataColumns; import net.micode.notes.data.Notes.NoteColumns; import net.micode.notes.data.NotesDatabaseHelper.TABLE; - - +//为存储和获取数据提供接口。可以在不同的应用程序之间共享数据 +//ContentProvider提供的方法 +//query：查询 +//insert：插入 +//update：更新 +//delete：删除 +//getType：得到数据类型 public class NotesProvider extends ContentProvider { + // UriMatcher用于匹配Uri private static final UriMatcher mMatcher; private NotesDatabaseHelper mHelper; @@ -51,7 +40,9 @@ public class NotesProvider extends ContentProvider { private static final int URI_SEARCH_SUGGEST = 6; static { + // 创建UriMatcher时，调用UriMatcher(UriMatcher.NO_MATCH)表示不匹配任何路径的返回码 mMatcher = new UriMatcher(UriMatcher.NO_MATCH); + // 把需要匹配Uri路径全部给注册上 mMatcher.addURI(Notes.AUTHORITY, "note", URI_NOTE); mMatcher.addURI(Notes.AUTHORITY, "note/#", URI_NOTE_ITEM); mMatcher.addURI(Notes.AUTHORITY, "data", URI_DATA); @@ -65,33 +56,40 @@ public class NotesProvider extends ContentProvider { * x'0A' represents the '\n' character in sqlite. For title and content in the search result, * we will trim '\n' and white space in order to show more information. */ + // 声明 NOTES_SEARCH_PROJECTION private static final String NOTES_SEARCH_PROJECTION = NoteColumns.ID + "," - + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," - + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," - + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + "," - + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + "," - + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," - + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; - + + NoteColumns.ID + " AS " + SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA + "," + + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_1 + "," + + "TRIM(REPLACE(" + NoteColumns.SNIPPET + ", x'0A','')) AS " + SearchManager.SUGGEST_COLUMN_TEXT_2 + "," + + R.drawable.search_result + " AS " + SearchManager.SUGGEST_COLUMN_ICON_1 + "," + + "'" + Intent.ACTION_VIEW + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_ACTION + "," + + "'" + Notes.TextNote.CONTENT_TYPE + "' AS " + SearchManager.SUGGEST_COLUMN_INTENT_DATA; + // 声明NOTES_SNIPPET_SEARCH_QUERY private static String NOTES_SNIPPET_SEARCH_QUERY = "SELECT " + NOTES_SEARCH_PROJECTION - + " FROM " + TABLE.NOTE - + " WHERE " + NoteColumns.SNIPPET + " LIKE ?" - + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER - + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE; + + " FROM " + TABLE.NOTE + + " WHERE " + NoteColumns.SNIPPET + " LIKE ?" + + " AND " + NoteColumns.PARENT_ID + "<>" + Notes.ID_TRASH_FOLER + + " AND " + NoteColumns.TYPE + "=" + Notes.TYPE_NOTE; @Override + // Context只有在onCreate()中才被初始化 + // 对mHelper进行实例化 public boolean onCreate() { mHelper = NotesDatabaseHelper.getInstance(getContext()); return true; } @Override + // 查询uri在数据库中对应的位置 public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, - String sortOrder) { + String sortOrder) { Cursor c = null; + // 获取可读数据库 SQLiteDatabase db = mHelper.getReadableDatabase(); String id = null; + // 匹配查找uri switch (mMatcher.match(uri)) { + // 对于不同的匹配值，在数据库中查找相应的条目 case URI_NOTE: c = db.query(TABLE.NOTE, projection, selection, selectionArgs, null, null, sortOrder); @@ -113,6 +111,7 @@ public class NotesProvider extends ContentProvider { case URI_SEARCH: case URI_SEARCH_SUGGEST: if (sortOrder != null || projection != null) { + // 不合法的参数异常 throw new IllegalArgumentException( "do not specify sortOrder, selection, selectionArgs, or projection" + "with this query"); } @@ -120,6 +119,8 @@ public class NotesProvider extends ContentProvider { String searchString = null; if (mMatcher.match(uri) == URI_SEARCH_SUGGEST) { if (uri.getPathSegments().size() > 1) { + // getPathSegments()方法得到一个String的List， + // 在uri.getPathSegments().get(1)为第2个元素 searchString = uri.getPathSegments().get(1); } } else { @@ -139,6 +140,7 @@ public class NotesProvider extends ContentProvider { } break; default: + // 抛出异常 throw new IllegalArgumentException("Unknown URI " + uri); } if (c != null) { @@ -148,13 +150,17 @@ public class NotesProvider extends ContentProvider { } @Override + // 插入一个uri public Uri insert(Uri uri, ContentValues values) { + // 获得可写的数据库 SQLiteDatabase db = mHelper.getWritableDatabase(); long dataId = 0, noteId = 0, insertedId = 0; switch (mMatcher.match(uri)) { + // 新增一个条目 case URI_NOTE: insertedId = noteId = db.insert(TABLE.NOTE, null, values); break; + // 如果存在，查找NOTE_ID case URI_DATA: if (values.containsKey(DataColumns.NOTE_ID)) { noteId = values.getAsLong(DataColumns.NOTE_ID); @@ -167,6 +173,7 @@ public class NotesProvider extends ContentProvider { throw new IllegalArgumentException("Unknown URI " + uri); } // Notify the note uri + // notifyChange获得一个ContextResolver对象并且更新里面的内容 if (noteId > 0) { getContext().getContentResolver().notifyChange( ContentUris.withAppendedId(Notes.CONTENT_NOTE_URI, noteId), null); @@ -178,13 +185,17 @@ public class NotesProvider extends ContentProvider { ContentUris.withAppendedId(Notes.CONTENT_DATA_URI, dataId), null); } + // 返回插入的uri的路径 return ContentUris.withAppendedId(uri, insertedId); } @Override + // 删除一个uri public int delete(Uri uri, String selection, String[] selectionArgs) { + //Uri代表要操作的数据，Android上可用的每种资源 -包括 图像、视频片段、音频资源等都可以用Uri来表示。 int count = 0; String id = null; + // 获得可写的数据库 SQLiteDatabase db = mHelper.getWritableDatabase(); boolean deleteData = false; switch (mMatcher.match(uri)) { @@ -228,6 +239,7 @@ public class NotesProvider extends ContentProvider { } @Override + // 更新一个uri public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { int count = 0; String id = null; @@ -267,10 +279,12 @@ public class NotesProvider extends ContentProvider { return count; } + // 将字符串解析成规定格式 private String parseSelection(String selection) { return (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')' : ""); } + //增加一个noteVersion private void increaseNoteVersion(long id, String selection, String[] selectionArgs) { StringBuilder sql = new StringBuilder(120); sql.append("UPDATE "); @@ -293,6 +307,7 @@ public class NotesProvider extends ContentProvider { sql.append(selectString); } + // execSQL()方法可以执行insert、delete、update和CREATE TABLE之类有更改行为的SQL语句 mHelper.getWritableDatabase().execSQL(sql.toString()); } @@ -302,4 +317,4 @@ public class NotesProvider extends ContentProvider { return null; } -} +} \ No newline at end of file diff --git a/src/Notes-master3/app/src/main/java/net/micode/notes/gtask/remote/GTaskManager.java b/src/Notes-master3/app/src/main/java/net/micode/notes/gtask/remote/GTaskManager.java index d2b4082..73c80f0 100644 --- a/src/Notes-master3/app/src/main/java/net/micode/notes/gtask/remote/GTaskManager.java +++ b/src/Notes-master3/app/src/main/java/net/micode/notes/gtask/remote/GTaskManager.java @@ -219,7 +219,7 @@ public class GTaskManager { if (name.startsWith(GTaskStringUtils.MIUI_FOLDER_PREFFIX) && !name.equals(GTaskStringUtils.MIUI_FOLDER_PREFFIX - + GTaskStringUtils.FOLDER_META)) { + + GTaskStringUtils.FOLDER_META)) { TaskList tasklist = new TaskList(); tasklist.setContentByRemoteJSON(object); mGTaskListHashMap.put(gid, tasklist); @@ -394,7 +394,7 @@ public class GTaskManager { try { c = mContentResolver.query(Notes.CONTENT_NOTE_URI, SqlNote.PROJECTION_NOTE, "(_id=?)", new String[] { - String.valueOf(Notes.ID_CALL_RECORD_FOLDER) + String.valueOf(Notes.ID_CALL_RECORD_FOLDER) }, null); if (c != null) { if (c.moveToNext()) { diff --git a/src/Notes-master3/app/src/main/java/net/micode/notes/model/Note.java b/src/Notes-master3/app/src/main/java/net/micode/notes/model/Note.java index 6706cf6..a59dcf4 100644 --- a/src/Notes-master3/app/src/main/java/net/micode/notes/model/Note.java +++ b/src/Notes-master3/app/src/main/java/net/micode/notes/model/Note.java @@ -34,10 +34,13 @@ import net.micode.notes.data.Notes.TextNote; import java.util.ArrayList; + public class Note { - private ContentValues mNoteDiffValues; + // private ContentValues mNoteDiffValues; + ContentValues mNoteDiffValues;// private NoteData mNoteData; private static final String TAG = "Note"; + /** * Create a new note id for adding a new note to databases */ @@ -49,16 +52,17 @@ public class Note { values.put(NoteColumns.MODIFIED_DATE, createdTime); values.put(NoteColumns.TYPE, Notes.TYPE_NOTE); values.put(NoteColumns.LOCAL_MODIFIED, 1); - values.put(NoteColumns.PARENT_ID, folderId); + values.put(NoteColumns.PARENT_ID, folderId);//将数据写入数据库表格 Uri uri = context.getContentResolver().insert(Notes.CONTENT_NOTE_URI, values); - + //ContentResolver()主要是实现外部应用对ContentProvider中的数据 + //进行添加、删除、修改和查询操作 long noteId = 0; try { noteId = Long.valueOf(uri.getPathSegments().get(1)); } catch (NumberFormatException e) { Log.e(TAG, "Get note id error :" + e.toString()); noteId = 0; - } + }//try-catch异常处理 if (noteId == -1) { throw new IllegalStateException("Wrong note id:" + noteId); } @@ -68,37 +72,37 @@ public class Note { public Note() { mNoteDiffValues = new ContentValues(); mNoteData = new NoteData(); - } + }//定义两个变量用来存储便签的数据，一个是存储便签属性、一个是存储便签内容 public void setNoteValue(String key, String value) { mNoteDiffValues.put(key, value); mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); - } + }//设置数据库表格的标签属性数据 public void setTextData(String key, String value) { mNoteData.setTextData(key, value); - } + }//设置数据库表格的标签文本内容的数据 public void setTextDataId(long id) { mNoteData.setTextDataId(id); - } + }//设置文本数据的ID public long getTextDataId() { return mNoteData.mTextDataId; - } + }//得到文本数据的ID public void setCallDataId(long id) { mNoteData.setCallDataId(id); - } + }//设置电话号码数据的ID public void setCallData(String key, String value) { mNoteData.setCallData(key, value); - } + }//得到电话号码数据的ID public boolean isLocalModified() { return mNoteDiffValues.size() > 0 || mNoteData.isLocalModified(); - } + }//判断是否是本地修改 public boolean syncNote(Context context, long noteId) { if (noteId <= 0) { @@ -128,16 +132,16 @@ public class Note { } return true; - } + }//判断数据是否同步 - private class NoteData { + private class NoteData {//定义一个基本的便签内容的数据类，主要包含文本数据和电话号码数据 private long mTextDataId; - private ContentValues mTextDataValues; + private ContentValues mTextDataValues;//文本数据 private long mCallDataId; - private ContentValues mCallDataValues; + private ContentValues mCallDataValues;//电话号码数据 private static final String TAG = "NoteData"; @@ -147,7 +151,7 @@ public class Note { mTextDataId = 0; mCallDataId = 0; } - + //下面是上述几个函数的具体实现 boolean isLocalModified() { return mTextDataValues.size() > 0 || mCallDataValues.size() > 0; } @@ -177,17 +181,17 @@ public class Note { mNoteDiffValues.put(NoteColumns.LOCAL_MODIFIED, 1); mNoteDiffValues.put(NoteColumns.MODIFIED_DATE, System.currentTimeMillis()); } - + //下面函数的作用是将新的数据通过Uri的操作存储到数据库 Uri pushIntoContentResolver(Context context, long noteId) { /** * Check for safety */ if (noteId <= 0) { throw new IllegalArgumentException("Wrong note id:" + noteId); - } + }//判断数据是否合法 ArrayList